[Linux-cluster] Low parallel write performance for GFS

From: "Rongfeng Tang" <rf_tang ncic ac cn>

To: "linux-cluster redhat com" <linux-cluster redhat com>

Subject: [Linux-cluster] Low parallel write performance for GFS

Date: Mon, 15 Nov 2004 11:47:55 +0800

Hello everyone:
I want to test the GFS-6.0 by myself, the configuration is as
follows:
2 GNBD server each with a dedicated SCSI disk, configured into one pool,
1 gulm lock server
10 clients
GE network
using iozone ran read and write testing on each client.
the aggregate write performance I got only about 20% of raw device peformance (10MB/s),
even much more lower than what one client can get (20MB/S), what's problem with it?
Thanks a lot.
trf